Keysight 53230A - Enabling Gate Signals on the Gate In;Out BNC

Triggering and Gating 5
Keysight 53220A/53230A User’s Guide 183
SENS:TINT:GATE:POL POS // set gate signal polarity
SENS:TINT:GATE:SOUR EXT // external gate source
Enabling gate signals on the ‘gate in/out’ BNC
For timing and synchronization with other instruments gate signals from sources
Time (internal), IMMediate (internal), and INPut[1]/INPut2
(Chan 1 and Chan 2 softkeys) can be routed to the rear panel ‘Gate In/ Out’
connector and assigned a polarity using the commands:
OUTPut[:STATe] {OFF|ON}
OUTPut[:STATe]? (query form)
OUTPut:POLarity {NORMal | INVerted}
OUTPut:POLarity? (query form)
ON enables “Gate Out” - gate signals are routed to the rear panel BNC. OFF
disables “Gate Out” - the BNC is an external (“Gate In”) source. Therefore,
OUTPut:STATe OFF must be set when the gate source is EXTernal.
NORMal - the polarity of the gate signal output from the "Gate Out" BNC is a
rising (positive) edge. INVerted - the gate signal polarity is a falling (negative)
edge.